Token Parameterization

I have started exploring WAPT for performing load testing. Well, I'm trying to parameterize the Token which is automatically generated.I tried using $UrlParam function but with no success. Actually this token gets generated for each user once the user logs in. I am getting Invalid Security Token Error in the logs.The parameter looks like:

I have started exploring WAPT for performing load testing. Well, I'm trying to parameterize the Token which is automatically generated.I tried using $UrlParam function but with no success. Actually this token gets generated for each user once the user logs in. I am getting Invalid Security Token Error in the logs.The parameter looks like: